The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2012
Filed:
Sep. 10, 2007
Gunnar Nitsche, Radebeul, DE;
Gunnar Nitsche, Radebeul, DE;
NXP B.V., Eindhoven, NL;
Abstract
The invention relates to a method and a system for calibrating an analogue I/Q-modulator () of a transmitter (), wherein a calibration signal (s(t)) is transmitted and an in-phase signal (s(t)) and a quadrature-phase signal (s(t)) of the calibration signal (s(t)) are adjusted by at least one predetermined compensation coefficient (C, D, E) in two calibration steps in at least one compensation measurement set (u, V, W), whereby: —in a first calibration step, the calibration signal (s(t)) is adjusted by a first complex compensation value (C, D, E) and an output signal of the detector circuit () is correlated with a harmonic (H, H) of said calibration signal (s(t)) to yield a first complex compensation measurement result (u, V, W), —in a second calibration step, the calibration signal (s(t)) is adjusted by a second complex compensation value (C, D, E) and the output signal of the detector circuit () is correlated with said harmonic (H, H) of said calibration signal (s(t)) to yield a second complex compensation measurement result (u, V, W), —a next optimum compensation value (C, D, E) of the complex compensation coefficient (C, D, E) is determined on said complex compensation values (C, C, D, D, E, E) and said complex compensation measurement results (u, U, V, V, W, W).